Improvement in steam-whistles



@diritti %iirit5 anni odia i WILLIAM s. COOPER," OE V PIIILADELPIIIA, PENNSYLVANIA, AssICNOR ro y COOPER, .IONEs a CA-DBIIRY, OE SAME PLACE.-

teneis Patent No. 109,388, aat-ed November 22, 1870.

The Schedule referred to in these Letters Patent` and making part of the same.

, hereafter, forjoperating the valve of a'steam-whistle,

the device being such as topermit the more ready adjustment of a whistle than when the latter is provided with the usual appliances for Operating the valve.

Description of the Accompanying Drawing. Figure l-is a #vertical section of a steam-,whistle with myimprovement;l Figure 2, an exterior view Of the same; and Figure 3, a vertical section, drawn to' an enlarged soale,of part of the whistle.

General Description.

A is a tubular valve-chest, inthe lower end of which is cut a screw-thread, for attachment to apipe on a lsteam-boiler, and within this chest is formed a seat, d', for a conical valve, B, arranged to be Opened downward, the valve having a stem, c, adapted to a perforated guide, f, in the Chest, and this stem beingsurrounded with a spiral spring, which tends to close thc valve to its seat by forcing it upward.

The chestis surmouuted with a cup, It, within which is secured a disk, D, the steam,` as usual, escaping through the narrow annnlarslit between the outer edge of this disk and the cup, and' impinging against the lower edge of the inverted metal cup E, attached to stem D projecting from the disk D.

The above-named parts are too similar to those of;

ordinary steam-whistles to render a more minute description of them necessary.

In my improvement I employ an ar'm, Gr, having at its upper vor outer end an eye for receiving the operating-cord or wire. i

At the opposite end of the arm is a square opening, adapted to the square end of a spindle, H, which passes through astniing-box, I, into the valve-Chest A The spindle is provided with two projections,x x, sitnated within an elongated Opening, g/formed iu the valve-spindle e, as best observed in the enlarged view, iigxS, so that whether the. arm G be moved to the right or to the'left, one or other of the projections xx will 'be the means of depressing the valve; and hence the adjustment of the whistle will be a matter Of less diiculty than when the arm has to be pulled in one direction only so as to depress the valve.

It will be observed that when the arm G is in a vertical position, the position of the projections x0; is such that the valve will be' raised to its seat by the spring, which also tends to retain the arm in a vertical position, owing to the fiat bot-tom ofl the opening y in the valve-spindle being nearly in contact and parallel with the tlat under side of the two projections' :o x.

The square end of the spindle adapted to the square hole in the arm permits the latter to be readily adjusted tothe pendulous position shown by dotted linesv in iig. 2, should circumstances.require such adjnstment.

The combination ina steani-whi'stleof the spindle VVvVitnesses:

WM. A. STEEL,- F. B. RICHARDS. 

